[Answered]Answer critical Thinking question #2 for chapter 6 on page 180. Answers should be submitted in word document with any associated references used 1 E.Coli was incubated with aeration in a nutrient medium containing two carbon sources, and the following growth curve was made from this culture A) Explain what happened at the time marked x B) Which substrate provided “better” growth condition for the bacteria? How can you tell?

A) At the time marked x, the growth of E. coli has plateaued which indicates that logarithmic growth has ended and all available resources have been exhausted. This means that the bacteria have reached a steady-state level in terms of population size, resource consumption and waste production. The cells are no longer able to utilize the current carbon sources for energy due to limited supply or nutrient depletion causing the rate of growth to slow down over time.

 

Answer critical Thinking question #2 for chapter 6 on page 180. Answers should be submitted in word document with any associated references used 1 E.Coli was incubated with aeration in a nutrient medium containing two carbon sources, and the following growth curve was made from this culture A) Explain what happened at the time marked x B) Which substrate provided “better” growth condition for the bacteria? How can you tell?

B) The substrate that provided “better” growth condition for the bacteria can be determined by comparing the two lines in the graph. It can be seen from this graph that one carbon source provides more favorable conditions for E.coli compared to others as its line is steeper indicating faster exponential growth rate when compared to other substrate’s line which is flatter indicating slower exponential growth rate . This suggests that E.coli was able to metabolize this particular carbon source at a higher rate allowing it to reach maximum population density earlier than with other substrates thereby resulting in better overall performance throughout experiment period

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